Malicious PDF — malware analysis report

Static analysis result for SHA-256 b346d2f16a4e2600…

MALICIOUS

PDF

71.9 KB Created: 2021-02-24 08:47:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ca60f5565aa3315dfdd3ce280007cfc2 SHA-1: 1f4832ad3c0dbace530deeac197209114c2e2d50 SHA-256: b346d2f16a4e2600af050d12234adb53dce0af8d069df538a7990b1d63d62817
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://druttle.ru/wb?keyword=que%20significa%20senior%20en%20un%20puesto%20de%20trabajo PDF link annotation
    • https://xekukagakodepa.weebly.com/uploads/1/3/3/9/133999272/zudozete.pdfIn PDF document text
    • https://cdn.sqhk.co/balekunu/jAgEjjY/kirabojonolasa.pdfIn PDF document text
    • https://cdn.sqhk.co/vumajotiwog/jfDk1gd/jejajajolebo.pdfIn PDF document text
    • https://cdn.sqhk.co/pewowutefiw/umgjRy8/slap_kings_free_play.pdfIn PDF document text
    • https://bovuxugiz.weebly.com/uploads/1/3/4/9/134901291/risabopipomikix.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwojosop/RJu6q6Q/70712548419.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/debiwelof/copying_sheet_excel_online.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/fabavatefawuj.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/nizibi.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/interview_form_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/tuzonitexoxisuzig.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/hosanna_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/codycross_answers_group_104_puzzle_3.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/how_to_take_battery_out_of_rca_tablet.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/sherlock_holmes_series_season_3_subtitles.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C8 5568 bytes
SHA-256: 26624fb0cccb26ac084de70c00e9fb1de7c013b115b22dc4844fbcc8561a60ec
font_01_sfnt_off0000e8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D1 12488 bytes
SHA-256: 444c396062f632053b6eedc201f317f928b4c600a9cbc23ed38594ab916606ae